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Ubuntu security documentation
Ubuntu security documentation
  • Software integrity
    • Ubuntu image integrity verification
    • Ubuntu archive integrity verification
  • Security updates
    • Expanded Security Maintenance (ESM)
    • Ubuntu OVAL data
    • Ubuntu OSV data
    • Ubuntu VEX data
  • Ubuntu security features
    • Overview of security features
    • Platform protections
      • CPU features
      • Devices
      • UEFI Secure Boot
    • Trusted Platform Module
    • Privilege restriction
      • AppArmor
    • Cryptography
      • Cloud PRNG Seed
      • Disable Legacy TLS
      • Password Hashing
    • Process and memory protections
      • Default compiler and linker flags
      • File Handing
    • Kernel protections
    • Storage and filesystem
      • File Encryption
      • Full disk encryption (FDE)
    • Encrypted LVM
    • Network and firewalls
      • Firewall
      • No Open Ports
      • SYN Cookies
  • Compliance automation
    • Ubuntu Security Guide (USG)
      • Install Ubuntu Security Guide
      • CIS
        • CIS benchmarks and profiles
        • Auditing an Ubuntu system for CIS compliance
        • Applying the CIS rules to the current system
        • Customizing CIS profiles
      • DISA-STIG
        • Auditing an Ubuntu system for DISA-STIG compliance
        • Applying the DISA-STIG rules
        • Customize DISA-STIG profiles
    • FIPS 140 for Ubuntu
      • Overview of FIPS-certified modules
      • Contacts
      • FIPS and Livepatch
      • How to install Ubuntu with FIPS mode enabled
      • How to switch Ubuntu to FIPS mode
      • FIPS mode with full disk encryption
      • How to connect to WiFi in FIPS mode
      • How to troubleshoot and solve common issues
  • Common security mistakes
    • Direct downloading of .debs from the archive
    • Downloading .debs from untrusted sources
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Common security mistakes¶

Direct downloading of .debs¶

  • Direct downloading of .debs from the archive
  • Downloading .debs from untrusted sources
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Direct downloading of .debs from the archive
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How to troubleshoot and solve common issues
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Last updated on Sep 18, 2025
Contents
  • Common security mistakes
    • Direct downloading of .debs